tree ef6cf465bc7fac9830d1ba6a74ab43472b7a0681
parent dc2e8074dc573a070e71da4be3d97c5f6b765dba
author Kamil Rytarowski <n54@gmx.com> 1569051042 +0000
committer Kamil Rytarowski <n54@gmx.com> 1569051042 +0000

Stop tracking atexit/__cxa_atexit/pthread_atfork allocations in LSan/NetBSD

Summary:
The atexit(3) and __cxa_atexit() calls allocate internally memory and free on exit,
after executing all callback. This causes false positives as DoLeakCheck() is called
from the atexit handler. In the LSan/ASan tests there are strict checks triggering
false positives here.

Intercept all atexit(3) and __cxa_atexit() calls and disable LSan when calling the
real functions.

Stop tracing allocations in pthread_atfork(3) funtions, as there are performed
internal allocations that are not freed for the time of running StopTheWorld()
code. This avoids false-positives.

The same changes have to be replicated in the ASan and LSan runtime.

Non-NetBSD OSs are not tested and this code is restricted to NetBSD only.

Reviewers: dvyukov, joerg, mgorny, vitalybuka, eugenis

Reviewed By: vitalybuka

Subscribers: jfb, llvm-commits, #sanitizers

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D67331

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@372459 91177308-0d34-0410-b5e6-96231b3b80d8